Method of radially expanding a tubular element

Details Method of radially expanding a tubular element Method of radially expanding a tubular element

E - Fixed Constructions

21

B

E21B 43/10 (2006.01)

Patent

CA 2704076

A method is provided of radially expanding a tubular element extending into a wellbore formed in an earth formation, the method comprising inducing the wall of the tubular element to bend radially outward and in axially reverse direction so as to form an expanded tubular section extending around a remaining tubular section of the tubular element, wherein said bending occurs in a bending zone of the tubular element, and increasing the length of the expanded tubular section by inducing the bending zone to move in axial direction relative to the remaining tubular section. One of the tubular element and the wellbore wall is provided with at least one seal member arranged to induce sealing of the expanded tubular section relative to the wellbore wall.

L'invention propose un procédé d'expansion radiale d'un élément tubulaire s'étendant dans un puits de forage formé dans une formation terrestre. Le procédé consiste à induire la paroi de l'élément tubulaire à se courber radialement vers l'extérieur et dans une direction axialement inverse de façon à former une section tubulaire expansée s'étendant autour d'une section tubulaire restante de l'élément tubulaire, ladite courbure se produisant dans une zone de courbure de l'élément tubulaire, et à augmenter la longueur de la section tubulaire expansée en induisant la zone de courbure à se déplacer dans une direction axiale par rapport à la section tubulaire restante. Soit l'élément tubulaire, soit la paroi de puits de forage comporte au moins un élément d'étanchéité agencé pour induire un scellement étanche de la section tubulaire expansée par rapport à la paroi de puits de forage.

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